wild cabbage vs Brassica oleracea

wild cabbage and Brassica oleracea both are nouns.

Word	Noun	Adjective	Verb	Adverb
wild cabbage	Yes	No	No	No
Brassica oleracea	Yes	No	No	No

As nouns, wild cabbage and Brassica oleracea are synonyms defined as:

wild cabbage and Brassica oleracea: wild original of cultivated cabbages; common in western coastal Europe

wild cabbage (noun)	Brassica oleracea (noun)
wild original of cultivated cabbages; common in western coastal Europe	wild original of cultivated cabbages; common in western coastal Europe
	any of various cultivars of the genus Brassica oleracea grown for their edible leaves or flowers